Compression moulding of complex parts using randomly-oriented strands thermoplastic composites

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Proceedings titleSAMPLE Seattle 2014
ConferenceSAMPE Tech Seattle 2014 Conference, June 2-5, 2014, Seattle, Washington
Pages113; # of pages: 13
SubjectComplex parts; Component testing; Fast Processing; Filling pressures; High pressure; Mechanical performance; Thermoplastic composite; Void contents
AbstractRandomly-oriented strands composites offer the possibility to mould complex parts with fast processing cycle. In this paper, effects of pressure and strand size on the quality of a T-shape part were studied experimentally. Low pressure results showed strand size effects on the filling of a 25 mm rib cavity. Filling pressures for three strand sizes were obtained. 10 bar of pressure was enough to fully consolidate parts with smaller strands (3.17 mm × 6.35 mm). Analyzing parts processed at minimal filling pressure showed a void content in the rib feature no greater than 1.2 %. Processing at higher pressure reduced void content between 0.22 % and 0.44 %. Mechanical testing (ASTM D2344) showed similar strength for ribs processed at filling pressure and high pressure. This same trend was obtained for component testing of the T-shape. The main findings show that processing a complex feature at filling pressure Pfill was sufficient to reach nominal mechanical properties. This suggested that porosity was not detrimental to the mechanical performance for the given tests.
Publication date
AffiliationAerospace; National Research Council Canada
Peer reviewedYes
NPARC number21276109
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Record identifierdee39d08-59bb-49f5-a730-b71425a1bc12
Record created2015-09-24
Record modified2016-05-09
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